You might have better luck looking on www.arcticchat.com as that is more of a flatlanders forum. Sometimes I have luck finding stuff on ebay for not too bad of price. Good luck with finding one though.
Checked both. But new ones on ebay for 150... few out there for 100. But its the 7220 pn. Which they say is the early build zr900.... thinking for $50 more I get new